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<1234567…34>
  • Double Buffer UtilityHi Folks, I've been experimenting with double buffering on a 48k Speccy for a small project I'm working on. After reading lots of good advice here…

    ... code
    self.disableInterupts() #3 - Disable Interupts
    self.storeRegisters() #4 - Store ... ('__CopyBuffer')


    #3 - Disable Interupts
    def disableInterupts(self):
    KrazyKattapilla KrazyKattapilla August 2014 Development
  • Best way to codeHi, I've been using Zeus Assembler to code MC programs so far. Nothing fancy just the odd scroll left or animation stuff. Wot I'd like to know is, …

    But do not forget to disable interupts while scrolling the screen or ... a lot of tricks.
    Interupts are used mainly for plaing ...
    LCD LCD August 2001 Sinclair Miscellaneous
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... it again on exit, and disable interupts.

    My table is ...
    dmsmith dmsmith August 2004 Development
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... it again on exit, and disable interupts.
    [/quote]
    Stack is ...
    moroz1999 moroz1999 August 2004 Development
  • how do i read the keyboard in assembly? here is the code i tried writting to find out the value of a key call 28f (hex) loop: ld a,255 cp e jr z loop ld (50000),e ret notes from what i …

    ... a partical address when i disable interupts?



    [ This ...
    mestor mestor August 2005 Development
  • how do i read the keyboard in assembly? here is the code i tried writting to find out the value of a key call 28f (hex) loop: ld a,255 cp e jr z loop ld (50000),e ret notes from what i …

    ... a partical address when i disable interupts?



    [ This ...
    Dr BEEP Dr BEEP August 2005 Development
  • how do i read the keyboard in assembly? here is the code i tried writting to find out the value of a key call 28f (hex) loop: ld a,255 cp e jr z loop ld (50000),e ret notes from what i …

    ... a partical address when i disable interupts?



    [ This ...
    mestor mestor August 2005 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    ... stack-pointer work, remember to disable interupts first, and restore the stack ...
    bobs bobs July 2007 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    ... stack-pointer work, remember to disable interupts first, and restore the stack ...
    Fikee Fikee July 2007 Development
  • Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…

    Have a look at this:

    [URL="http://www.shadowmagic.org.uk//cssfaq/reference/128kreference.htm"]128K ZX Spectrum Reference[/URL] :-)

    You have to disable interupts before paging memory
    zx128k zx128k September 2007 Development
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ...
    DEC D
    DI ; Disable interupts
    CALL &0562 ; Call ... ; Restore flags
    EI ; Enable interupts
    RET C ; No error ...
    Jonathan Harston Jonathan Harston July 2009 Development
  • Bug fixing woesGaahhhh! I've spent an afternoon off work agonizing over why my routine didn't work. It's something I'd already restarted so didn't want to wipe th…

    ... (though I did forget to disable interupts when tired the other evening ...
    R-Tape R-Tape September 2011 Development
  • Bug fixing woesGaahhhh! I've spent an afternoon off work agonizing over why my routine didn't work. It's something I'd already restarted so didn't want to wipe th…

    ... (though I did forget to disable interupts when tired the other evening ...
    Gedlion Gedlion August 2012 Development
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... wait for midi communication. But after press SPACE this routine refresh ... /> If messenger detect disable interrupt then return via jump ... NMI to program/game with disable interrupt.

    ...
    velesoft velesoft August 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... mouse.

    - add possibility disable kempston port (collision with some ...

    - add jumper for disable rewriting rom (disconnect /WR from ... button for pause computer (active /WAIT) - static ram chips not need refresh :-)
    velesoft velesoft December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... ]
    - add possibility disable kempston port (collision with some ... /> - add jumper for disable rewriting rom (disconnect /WR ... (active /WAIT) - static ram chips not need refresh :-)[/QUOTE]< ... /2 microcontroller), and enable/disable /WAIT when you push "Pause ...
    antoniovillena antoniovillena December 2012 Hardware
  • New game: SolarGun 1.0[img]https://dl.dropboxusercontent.com/u/75238938/solargun4.png[/img] [img]https://dl.dropboxusercontent.com/u/75238938/solargun5.gif[/img] (that g…

    ... "
    sub-section "Interrupt Enable/Disable"

    The EI instruction ... (to sync with the screen refresh), it will lockup forever, since ... ) before returning, hence HALT will wait forever for interrupts to be ...
    RMartins RMartins March 2016 Brand new software
  • Rendering techniques in emulatorsI've been giving thought to the possibility of speeding up the rendering in Zero considering I've been putting it off long enough. My approach is c…

    ... by reducing the amount of wait time till the CPU can ... faster than the monitor refresh, unless you disable vsync locking which allows ...
    AndyC AndyC October 2016 Emulators
  • refresh rate 60hz ??X128 is the best ZXSpectrum simulator of all... ...but have a problem: refresh rate is poor = 60hz... I have a Samsung 950p & Gforce256DDR and both i…

    ... ...
    ...but have a problem: refresh rate is poor = 60hz...
    Alberto Alberto March 2001 Emulators
  • Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…

    ... , I wouldn't want to wait until someone finds and uploads ... extract the codes, not to disable it !), after all, although it ...
    GOC GOC August 2003 Sinclair Miscellaneous
  • Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…

    ... :


    HALT ; Wait for VSYNC Refresh

    LD IX ...
    robpearmain robpearmain August 2004 Development
  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…

    When my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing.

    I know I need to wait about 14300T after interrupt but how can I tell if the ULA is now past the border and onto the screen?
    robpearmain robpearmain September 2004 Development
  • The long waitNot only did we have to wait on our games loading, but had to wait yonks on the mail orders. Thats the thing that really drove my patience. Please …

    ... only did we have to wait on our games loading, but ... had to wait yonks on the mail orders ...
    GeeKay GeeKay October 2004 Games
  • Help! BREAK KEY disable?Someone has asked me... Is there a poke or routine to disable the Break key in 128K BASIC?

    Someone has asked me... Is there a poke or routine to disable the Break key in 128K BASIC?
    chaosmongers chaosmongers July 2005 Development
  • Z80 -- disable printing?Does anyone know a way (config setting or patch) to disable ZX Printer emulation in Gerton Lunter's Z80 version 4? Without disabling RS232 (print-to…

    ... (config setting or patch) to disable ZX Printer emulation in Gerton ...
    robert@fm robert@fm August 2006 Emulators
  • Pixel Explosion CodeJust a little snippet to cause explosive effects. It uses table lookups for the screen address, and can handle up to 32 pixel particles. A particle…

    ... />
    lp1:
    halt ; Wait for screen refresh every 1/50th
    robpearmain robpearmain September 2006 Development
  • Q. on WinXP logon screen (how to disable?)Aaaargh! I am sitting in front of an annoying computer. It's driving me crazy! How the f-in A does one disable the stinking logon screen (the "cla…

    ... f-in A does one disable the stinking logon screen (the ...
    Skarpo Skarpo September 2006 Chit chat
  • 128k Page FlippingOver on adverts, AOwen wrote the following: [quote=aowen]The trick, as I understand it, is to redraw the whole screen each time at #c000, but point…

    ... . Do you have to wait for a refresh (HALT) until swapping screens ...
    robpearmain robpearmain December 2006 Development
  • Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…

    ... in a similar way to disable all onboard memory - like ROMCS ... , as then you could selectively disable CPU access to any piece ...
    Jonathan Harston Jonathan Harston June 2007 Hardware
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... br />
    Refresh...
    A refresh is each cycle when ... s why Zilog introduced refresh cycle in Z80 as ... is not random!!!
    The refresh period is: [B]64us ... which is a maximal refresh period value.
    ... are no any additional refresh cycles (or there is ...
    brian-82 brian-82 November 2007 Development
<1234567…34>

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HitBox

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refresh 1.1K 1.5K
wait 12.3K 13.6K
disable 1.8K 2.2K
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  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing.<br /> <br /> I know I need to wait about …
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